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111L E AIL UWE am <br /> NORTH AMERICAN TECHNICAL SERVICES, INC <br /> PERCOLATION TEST DATA SHEET <br /> PROJECT: 25071 S.Lammers Rd,Tracy PROJECT No: 22-355G DRILL DATE: 12/20/2022 <br /> TEST HOLE NO.: P-1 TESTED BY: A.Krause TEST DATE: 12/21/2022 <br /> DEPTH OF TEST HOLE(ft),Dt: 3.5" CLASSIFICATION: 0.0-2.5 ft: Dk brown,damp,medium plastic CLAY,cemented from 2.0-2.S'(CL) <br /> DIAMETER(inches)= 6.0 (USCS) 2.5-3.5 ft:Brown,fine gravelly CLAY(CL) <br /> PRE-SATURATION <br /> Time Interval Initial Depth of Final Depth of Change in Water <br /> Trial No. Start Time Stop Time (min) Water(in) Water(in) Level(in) Comments: <br /> 12/20/2022 9:36 10:06 30 12.0 8.0 4.0 <br /> 12/20/2022 10:06 10:36 30 12.0 8.0 4.0 <br /> Note:At 10:36 AM 12/20/23 Refilled to 12.0"and at 9:40AM 12/21/22 no water remained in hole. <br /> TEST MEASUREMENTS <br /> Time Interval Initial Depth of Final Depth of Change in Water <br /> (At) Water(H) Water(Hf) Level(AH) Percolation Rate <br /> Trial No. Start Time Stop Time (min) (in) (in) (in) (minute/inch) <br /> 1 9:40 10:10 30.0 6.0 3.00 3.00 10.00 <br /> 2 10:10 10:40 30.0 6.0 3.25 2.75 10.91 <br /> 3 10:40 3:40 30.0 6.0 3.50 2.50 12.00 <br /> 4 3:40 11:40 30.0 6.0 4.00 2.00 15.00 <br /> 5 11:40 12:10 30.0 6.0 4.50 1.50 20.00 <br /> 6 12:10 12:40 30.0 6.0 5.00 1.00 30.00 <br /> 7 12:40 1:10 30.0 6.0 4.50 1.50 20.00 <br /> 8 1:10 1:40 30.0 6.0 5.00 1.00 30.00 <br /> 9 <br /> 10 <br /> 11 <br /> 12 <br /> 13 <br /> 14 <br /> 15 <br /> 16 <br /> 17 <br /> 18 <br /> 19 <br /> 20 <br /> Comments: Final Steady Percolation Rate=30 MPI;Test Hole Backfilled 12/21/22 <br /> See attachment for conversion to gal/sf per day,Test data certified by SJCEHD(See Figure-3). <br />